I've opened it before.  It's like an odometer which will trigger a switch
(turn on the OXS light) for every preset miles.   Once you reset it, it
will start counting again.    Push the button several times just to make
sure you really have reset the mechanical counter.  Like you reset the trip
odometer to 0.  The same box used to turn on the EGR light for the older
VW's.

Yi-Ruey Wei
87 Vanagon GL Syncro  w/leaking cylinder head
85 Jetta GLI  w/160,000 miles
"Hot" Dallas, TX

Sean Bartnik <bartnik@HOTMAIL.COM> on 07/22/98 05:00:30 PM

Please respond to Sean Bartnik <bartnik@HOTMAIL.COM>
To:   Vanagon@VANAGON.COM
cc:
Subject:  Re: OXS light on dash

>  So if the last guy turned it off at, say, 32,000 miles the next time
Apparently the mileage counter doesn't start counting again until the
light is reset.  When my EGR light came on (same thing, but found on the
older air-cooled vans) it came on at some weird mileage, not even close
to being a round number.  There probably is some kind of mechanical
switch

----------------------------------------------------------------
The information transmitted is intended only for the person or entity to
which it is addressed and may contain confidential and/or privileged
material.  Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited.   If you received
this in error, please contact the sender and delete the material from any
computer.